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Secondary structure
From Proteopedia
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Secondary structure of a protein refers to the three-dimensional structure of local segments of a protein. Each type of secondary structure has segments that have a repeating conformational pattern which is produced by a repeating pattern of values for the phi and psi torsional angles. For this reason on a Ramachandran plot for a particular secondary structure the values for phi and psi are located at a particular area of the plot. for example alpha helices and beta sheets are secondary structure. The structure on the right of a human transferrin n-lobe mutant (PDB code 1dtg) is shown in cartoon backbone representation to highlight its secondary structure, with alpha-helices in magenta and beta-sheets in yellow.
For more information, see Wikipedia's page on secondary structure.
Proteopedia Page Contributors and Editors (what is this?)
Wayne Decatur, Karl Oberholser, Eric Martz, Joel L. Sussman, Karsten Theis, Eran Hodis
